Design of damping-ring for vibration control in labyrinth air seals
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摘要: 运用弹性力学和接触力学的有关理论研究了用于篦齿封严装置减振的阻尼环设计方法.采用动柔度法求解了安装有阻尼环的篦齿封严装置的动力响应.分析了阻尼环尺寸和接触压力等参数对篦齿封严装置动力响应的影响规律:在篦齿封严装置和阻尼环的组合结构中,存在最佳的阻尼环结构参数,此时阻尼环减振效果最佳;对组合结构不同的周波型振动,阻尼环的减振效果不同.Abstract: The design and application of severed damping-ring to rotor/stator components are effective in protecting labyrinth air seals and the cylindrical walls of annular chambers against flexural vibration and fatigue failures excited by various disturbing forces. The dynamic analysis of contact system was complex due to its non-linear and chaotic behavior in the process. The theory for vibration control in labyrinth air seals was built up by elastic mechanics and contact mechanics. The dynamic response of labyrinth air seals with different damping-ring and contact pressure was analyzed by dynamic compliance method. The simulation results confirmed the validity of the proposed model and method and showed that the damping-ring could reduce the amplitude of the labyrinth air seals notably. There were the best parameters of damping-ring, which lead to the best effect of vibration control. The vibration control of damping-ring was different to different modal shape of labyrinth air seals.
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Key words:
- air seals /
- damping-ring /
- dry friction /
- vibration control
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